JPS6034251B2 - Method and device for assembling a terminal body to a capacitor terminal board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention primarily relates to a method and apparatus for roughly attaching a terminal body comprising a rivet and a lug terminal to a terminal plate of an electrolytic capacitor.

Conventionally, caulking methods and electric welding methods have been employed as methods for attaching terminal bodies to capacitor terminal plates made of rubber-attached Bakelite or the like. The crimping method involves passing a cross-shaped glue pet through the terminal board from the back side, pressing the base of the lug terminal into the penetrating end, and in this state pressing the rivet end into a head shape using a press machine. This method roughly attaches the lug terminal and the lug terminal to the terminal board in a state where they are mechanically and electrically connected to each other. On the other hand, in the electric welding method, a headed rivet is passed through the lug terminal base, and the IJ pet head is electrically welded to the lug terminal base with the rivet passed through the terminal plate from the front side.

Thereafter, the rivet is fixed to the terminal plate by forcibly pushing a washer into the terminal plate or into the pet shaft. However, the crimping method described above has the disadvantage that the contact between the rivet and the lug terminal becomes loose, which tends to cause poor electrical contact.

In addition, although the electric welding method provides good electrical contact, it requires two steps: welding and caulking by pressing in the washer as described above, which increases costs and reduces productivity. was inferior to By the way, in this electric welding method, it is possible to omit the crimping step by passing the cross-shaped rivet used in the crimping method through the terminal plate from the back side and electrically welding the lug terminal to the penetrating end. However, unless pressure is applied to the rivet by caulking, sufficient adhesion between the rivet and the terminal board cannot be achieved, resulting in poor sealing inside the capacitor, which can cause so-called liquid leakage, especially in electrolytic capacitors. There is a problem. In view of the above circumstances, the present invention
An object of the present invention is to provide a method and device for assembling a terminal body to a capacitor terminal plate, which allows simultaneous caulking and fixing of a rivet and lug terminal to the terminal plate, and electrical welding of the rivet and lug terminal to the terminal plate. The structure is as follows. The method of the present invention involves attaching the rivet to the terminal board on the lower side (
Set these on the lower mold with a lug terminal attached to the penetrating end, bring the upper mold closer to the lower mold, and insert the caulking pin equipped on the upper mold. The rivet and lug terminal are caulked and fixed to the terminal board by crushing the pet end portion to form a head, and at the same time as this caulking is completed, a cylindrical shape concentrically arranged around the outer circumference of the caulking pin is attached. The rivet head and the lug terminal are electrically welded by passing a welding current through an electrode to the contact portion between the rivet head and the lug terminal.

Furthermore, the device of the present invention includes a lower mold and an upper mold to which a pressing force is applied, and the lower mold has a mounting support surface for the terminal board and a support surface for penetrating the terminal board from the lower side (back side). A welding electrode is formed with a recess into which the lower part of the upper part is inserted, and the upper mold is provided with a caulking pin that crushes the penetrating end of the terminal plate of the upper part to form a head. At the same time, a cylindrical welding electrode is placed around the outer periphery of this caulking pin via an electrical insulator, with the lower end protruding downward from the pin, and this cylindrical electrode moves up and down elastically with a predetermined stroke. The present invention is characterized in that it is attached to the upper die via a spring so as to be able to do so, and the electrode of the lower die and the cylindrical electrode of the upper die are connected to a welding power source.

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a state in which the terminal body has been assembled to the terminal board.

Reference numeral 1 designates a terminal plate formed by pasting rubber 12 on the front side of a Bakelite substrate 11, 2 a rivet, and 3 an L-shaped lug terminal.

In this embodiment, as shown in the figure, a terminal block 1 has a bipolar structure in which two sets of terminal bodies each consisting of a rivet 2 and a lug terminal 3 are attached. It is also applicable to a single-pole structure with only one set of terminal bodies and a multi-pole structure with three or more terminals.

The terminal board 1 is provided with two glue pet insertion holes 13, 13 at a predetermined interval, and the rivet insertion holes 13, 13 have flanges 21, 21 in the middle, and the pets 2, 2 are inserted into the terminal slope. It is inserted from the side (back side).

The bases 31, 31 of the lug terminals 3, 3 are iron-fitted to the terminal plate penetrating ends 22, 22 of the rivets 2, 2 through the holes 32, 32, and the terminal plate 1 and the lug terminal bases 31, 31
or by crushing the pet ends 22, 22 to remove the head 23.
, 23, the rivet 2 and lug terminal 3
is caulked and fixed to the appearance plate 1. Then, at the same time as this caulking is completed, the rivet heads 23, 23 and the lug terminal bases 31, 31 are electrically welded, thereby completing the terminal body assembly shown in FIGS. 1 and 2. 3 and 4 show an apparatus for roughly attaching the terminal body. 4 is a lower mold, 5 is an upper mold, and both molds 4 and 5 are assembled into a press machine or a welding machine having a pressurizing force.

Reference numeral 6 denotes a head for holding the upper die, and the head 6 is configured to move up and down to bring the upper die 5 closer to and away from the lower die 4.

The lower mold 4 has a ring-shaped main body 41 made of iron and an electrode plate 42 made of copper.
The upper surface 43 on which the terminal plate 1 is supported by Hagimoto is formed flat as a whole, and the recesses 44, 44 into which the rivets 2, 2 are inserted are formed in the upper surface of the electrode plate 42. ing.

The electrode plate 42 of the lower die 4 is connected to, for example, the negative side of a welding machine power supply unit such as a static-accumulated resistance welding machine (not shown). On the other hand, the upper mold 5 has caulking pins 51, 51 protruding from the center of its lower surface, and cylindrical electrodes 52, 52 made of copper or the like are arranged concentrically around the outer periphery of the pins 51, 51.

On the inner surfaces of the cylindrical electrodes 52, 52, layers 53, 53 of heat-resistant electrical insulating material such as Teflon are formed. A pin 54 is fixed in a horizontal position to the outer peripheral side surface of the electrodes 52, 52, and this pin 54 is engaged with a guide hole 56 of a guide plate 55 made of an electrical insulator attached to the lower surface of the upper mold 5. . The guide hole 56 is formed in the shape of a vertically elongated hole, and the cylindrical electrodes 52, 52 can move up and down within the range of the guide hole 56. Further, the electrodes 52, 52 are connected to, for example, a plug in the welding machine power supply section via the pins 54, 54. It is followed by the base side. Coil springs 57 and 57 are iron-loaded onto caulking pins 51 and 511 between the cylindrical electrodes 52 and the lower surface of the upper mold 5, and the electrodes 52 and 52 are constantly pressed downward by the springs 57 and 57. , so that it can move up and down elastically.

Reference numerals 58 and 58 designate washers made of electrically insulating material and interposed between the upper end surfaces of the electrodes 52 and the lower end of the spring.

The cylindrical electrodes 52, 52 also serve as guides for the welding machine rivet heads 23, 23 when the rivets 2, 2 are caulked.

That is, the lower ends of the electrodes 52, 52 are connected to the caulking pin 51.
, 51, and when the electrodes 52, 52 are raised to the maximum extent as shown by the imaginary lines in FIG. 4, the lower ends of the electrodes still protrude from the pins 51, 51 by a predetermined length 1. This protrusion length 1 becomes the thickness of the heads 23, 23 due to caulking of the rivets 2, 2. In addition, the same rivet head 2
The diameter dimensions of the electrodes 3 and 23 are regulated by the inner peripheral surface of the lower end of the electrode. Note that the electrodes 52, 52 are formed in a tapered shape with the lower end portions converging downward so that the lower end surfaces thereof fall within the area of the base portions 31, 31 of the lug terminals 3, 3. A height detection plate 61 is fixed in a horizontal position to the outer peripheral surface of the head 6, and a screw 62 screwed vertically into the plate 61 operates a microswitch 7 disposed directly below the height detection plate 61. There is.

That is, the head 6 is connected to the caulking pins 51, 51 of the upper die 5.
When the rivet has descended to the final position of rivet caulking, the microswitch 7 is activated, and this signal activates the welding machine switch circuit, which causes the power source to output the electrodes 52, 52 of the upper mold 5 and the electrode plates 42, 42 of the lower mold 4. The structure is such that a welding current is passed between the two. The operation of assembling the terminal body onto the terminal board 1 using the above-mentioned apparatus will now be described in detail.

I from the bottom of the rivet insertion holes 13, 13 of the terminal plate 1
J pet 2, 2 is inserted, and the insertion end 22,
With the bases 31, 31 of the lug terminals 3, 3 mounted on the terminals 22, these are set in the lower mold 4.

In other words, if the terminal board protrudes downward or the lower part 24 of the terminal board
, 24 are inserted into the recesses 44, 44 of the electrode plate 42, and the terminal plate 1 is placed on the upper surface 43 of the lower mold. Note that, if necessary, a removable holding plate (not shown) for fixing the terminal board 1 may be attached to the upper surface 43 of the lower mold. In this state, the head 6 is lowered to bring the upper mold 5 closer to the lower mold 4, and as shown in FIG. The lower end surfaces of the electrodes are brought into contact with the bases 31, 31 of the lug terminals 3, 3.

From this position, the head 6 is rapidly lowered, and the rivet upper end 2 is tightened with the caulking pins 51, 51 as shown in the opening in FIG.
2 and 22 are crushed to form heads 23 and 23. During this rivet crimping, the cylindrical electrodes 52, 52 move upwardly against the springs 57, 57 due to the lowering of the upper mold 5, with their lower end surfaces in contact with the lug terminal bases 31, 31. At this time, as described above, the rivet heads 22, 22 are formed with a constant thickness and diameter by the cylindrical electrodes 52, 52. In this way, at the same time as the caulking of the rivets 2 and 2 is completed, the aforementioned micro switch 7
A welding current is caused to flow between the cylindrical electrodes 52, 52 of the upper mold 5 and the electrode plate 42 of the lower mold 4 from the welding machine power supply section by the operation of the detection device.

As a result, the pet heads 23, 23 and the lug terminal bases 31, 31 are mechanically connected by the caulking and welded as shown by the large line in the opening in FIG. When the rivet 2 is just crimped, the rivet head 23 and the lug terminal base 31 are not in perfect contact with each other, and the contact resistance between them is large.

In this device, the rivet head 23 and lug terminal base 31
The contact resistance is used as welding resistance to weld the contact portion, and by this welding, the rivet 2 and the lug terminal 3 can be joined in a good contact state with almost zero contact resistance. . After the above electric welding, the head 6 is raised to separate the upper and lower molds 5 and 4, and the terminal plate 1 with the terminal body assembled thereon is taken out from the lower mold 4. Then, when assembling the capacitor, the terminal plate 1 with the terminal body roughly attached is attached to the capacitor case in which the element is installed, and at this time, the terminal plate glue pet 2 is connected to the lead wire of the internal element by caulking or the like. be done. By the way, in the method of the present invention, at the stage of caulking the rivet 2, the cylindrical electrode 52
It is also possible to raise the electrode 52 and lower the same electrode 52 at the same time as the caulking is completed so that it covers the rivet head 23, and brings the lower end surface into contact with the lug terminal base 31 to perform welding.

In addition, the specific configuration of the lower mold 4 and the upper mold 5, and the lower mold 4
The means for holding the terminal plate 1 and the terminal body can be selected as appropriate for implementation. As described above, according to the present invention, when attaching a terminal body consisting of a rivet and a lug terminal to a terminal board, caulking of the rivet and welding of the rivet and lug terminal can be performed at the same time. The lug terminals can be completely integrated electrically, and the cost can be lowered and productivity can be greatly improved compared to conventional electric welding methods.

Furthermore, according to the device of the present invention, when the rivet is caulked using the caulking pin, the diameter and thickness of the rivet head are regulated by the cylindrical electrode, so that an even and constant caulking effect can be obtained, and the caulking It is possible to smoothly and quickly transition to electric welding as soon as the process is finished.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view showing a state in which the terminal body has been assembled to the terminal board, Fig. 2 is a sectional view thereof, and Fig. 3 is a partially sectional front view of the silk attaching device. , Figure 4 is the same side view, Figure 5 is the same side view.
The figure is a partially enlarged sectional view showing the procedure for attaching the terminal body. 1...Terminal board, 2...Rivet, 22
....Terminal plate penetration end of the same rivet, 23...
- Same amount part, 24... Lower part, 3... Lug terminal, 31... Same terminal base, 4... Lower mold, 4
2... Lower electrode plate, 43... Terminal board teaching layer support surface, 44... Recessed part for rivet iron, 5... Upper Type, 51...Clinching pin,
52... Same cylindrical electrode, 53... Electric insulating material layer, 57... Spring. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A terminal body is constituted by a rivet and a lug terminal, and the rivet of this terminal body penetrates a terminal plate made of an electrical insulator,
A method for assembling a terminal body to a capacitor terminal board, in which the terminal body is assembled to the terminal board in a state in which the lug terminal is mechanically and electrically coupled to the terminal board penetrating end of the rivet, the method comprising: The terminal board is penetrated from the bottom side, and a lug terminal is fitted to the penetrating end, and these are set in the lower mold, and the upper mold is brought close to the lower mold, and the terminal board is mounted on the upper mold. The rivet and lug terminal are fixed to the terminal board by crushing the end of the rivet with a crimping pin to form a head, and at the same time as this crimping is completed, a cylindrical electrode is placed concentrically around the outer periphery of the crimping pin. A method for assembling a terminal body to a capacitor terminal plate, characterized in that the rivet head and the lug terminal are electrically welded by passing a welding current through the contact portion of the rivet head and the lug terminal. 2 A terminal body is composed of a rivet and a lug terminal, and the rivet of this terminal body penetrates a terminal plate made of an electrical insulator,
A device for assembling a terminal body to a capacitor terminal board, which assembles the terminal body to the terminal board in a state where the lug terminal is mechanically and electrically coupled to the terminal board penetrating end of the rivet, the device comprising: a lower mold; an upper die to which a pressing force is applied, and the lower die has a mounting support surface for the terminal plate and a recess into which a lower portion of a rivet penetrating the terminal plate from below is fitted. The upper mold is provided with a caulking pin that crushes the terminal plate penetrating end of the rivet to form a head, and a cylindrical shape is attached to the outer periphery of the caulking pin via an electrical insulator. Welding electrodes are arranged concentrically with their lower ends protruding downward from the pin, and this cylindrical electrode is attached to the upper die via a spring so that it can elastically move up and down with a predetermined stroke. 1. An apparatus for assembling a terminal body to a capacitor terminal plate, comprising an electrode and an upper cylindrical electrode connected to a welding power source.